NEW YORK, Jan. 11, 2016 -- A man dresses in Star Wars "Darth Vader" costume attends the annual "No Pants Subway Ride" at Union Square subway station in New York, the United States, Jan. 10, 2016. The event is organized by Improv Everywhere, this self described "prank collective", which draws thousands of participants in New York City and around the world. (Xinhua/Li Muzi)
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